Replaced em-dash by comma

Author: MURATA Makoto

index.html

@@ -171,12 +171,12 @@ <h4 >(1) Japanese case</h4>
           that were read in Japanese, and there was no standardized 
           mapping between characters and Japanese readings. Ruby therefore
 	  served to designate a reading chosen by the annotator for each
-	  character—whether a Japanese reading (kun’yomi) or a Sino-Japanese
-	  reading based on Chinese pronunciation (on’yomi)—rather than a
+	  character, whether a Japanese reading (kun’yomi) or a Sino-Japanese
+	  reading based on Chinese pronunciation (on’yomi), rather than a
 	  fixed or 
           normative pronunciation. From its origin, Japanese ruby 
-          thus spanned two languages—the written text in Chinese 
-          characters and the annotation in Japanese—and reflected 
+          thus spanned two languages, the written text in Chinese 
+          characters and the annotation in Japanese, and reflected 
           interpretive reading practices rather than codified 
           phonetic systems. These annotation practices have continued, 
           with evolving forms and functions, throughout the history